Consumer advocates and businesses will be watching Sens. John Kerry, D-Mass., and John McCain, R-Ariz., roll out privacy legislation Tuesday.
The senators say their bill will establish a "framework to protect the personal information of all Americans both online and offline."
Top tech companies, including Microsoft and HP are expected to support the measure, but consumer groups sent a letter to Kerry and McCain saying they can't support the legislation as currently written.
"Their bill needs to be significantly strengthened if it is to effectively protect consumer privacy rights in today's digital marketplace," according to a statement from the coalition, which includes Consumer Watchdog, the Center for Digital Democracy, Consumer Action, Privacy Rights Clearinghouse and Privacy Times.
Kerry and McCain are scheduled to unveil their bill at 12:30.